Sony GRAND WEGA KDF-55XS955 User manual

LCD PROJECTION TELEVISION
SERVICE MANUAL LA-3 CHASSIS
MODEL NAME REMOTE COMMANDER DESTINATION
9-965-974-05
KDF-55XS955 RM-Y915 US/CND
KDF-60XS955 RM-Y915 US/CND
Self Diagnosis
Supported model
KDF-55XS955 RM-Y915
All manuals and user guides at all-guides.com
all-guides.com

3
KDF-55XS955/60XS955
KDF-55XS955/60XS955
TABLE OF CONTENTS
Specifications ................................................................................. 4
Warnings and Cautions .................................................................. 6
Safety Check-Out........................................................................... 7
Self-Diagnostic Function................................................................. 8
SECTION 1: DISASSEMBLY............................................................... 13
1-1. Rear Cover Removal............................................................ 13
1-2. Center Pillar Removal.......................................................... 13
1-3. Chassis Assembly and Fan Removal .................................. 14
1-4. Service Position ................................................................... 14
1-5. Power Supply Block Removal (Lamp Drive Unit)................. 15
1-6. RF Antenna Switch and P Board Removal .......................... 15
1-7. U Board, H4 Board, and Fan Removal ................................ 16
1-8. F Board and G1 Board Board Removal............................... 16
1-9. ABoard and KD Board Removal.......................................... 17
1-10.Q Box Assembly and B Board Removal............................... 17
1-11.G2 Board Removal............................................................... 18
1-12.Woofer Removal .................................................................. 18
1-13.Optics Unit Block Assembly and D.C. Fan Removal............ 19
1-14.TBoard Removal................................................................. 19
1-15.Front Cover Assembly and H1 Board Removal ................... 20
1-15-1. Replacing the Lamp................................................. 20
1-16.HM Board and H2 Board Removal....................................... 20
1-17.H3 Board and Speaker Removal ......................................... 21
1-18.Screen Mirror Block Assembly Removal.............................. 21
1-19.Mirror Cover Assembly Removal.......................................... 22
1-19-1. Diffusion Plates (Screens) Tape Method ................. 22
Wire Dressing....................................................................... 23
SECTION 2: CIRCUIT ADJUSTMENTS.............................................. 27
2-1. Setting the Service Adjustment Mode.................................. 27
2-2. Service Adjustment Mode Memory ...................................... 27
2-3. Memory Write Confirmation Method .................................... 28
2-4. Remote Adjustment Buttons and Indicators......................... 28
2-5. H/V Center Confirmation and Adjustments .......................... 29
2-6. Service Data......................................................................... 30
2-7. ID Map Table........................................................................ 32
SECTION 3: DIAGRAMS..................................................................... 33
3-1. Circuit Boards Location........................................................ 33
3-2. Printed Wiring Boards and
Schematic Diagrams Information......................................... 33
3-3. Block Diagrams.................................................................... 35
3-4. Schematics and Supporting Information.............................. 36
ABoard Schematic Diagram (1 of 3).................................... 36
ABoard Schematic Diagram (2 of 3).................................... 37
ABoard Schematic Diagram (3 of 3).................................... 38
B Board Schematic Diagram (1 of 6) ................................... 41
B Board Schematic Diagram (2 of 6) ................................... 42
B Board Schematic Diagram (3 of 6) ................................... 43
B Board Schematic Diagram (4 of 6) ................................... 44
B Board Schematic Diagram (5 of 6) ................................... 45
B Board Schematic Diagram (6 of 6) ................................... 46
G2 Board Schematic Diagram (1 of 2)................................. 49
G2 Board Schematic Diagram (2 of 2)................................. 50
PBoard Schematic Diagram ............................................... 53
KD Board Schematic Diagram............................................. 54
G1 Board Schematic Diagram (1 of 2)................................. 56
G1 Board Schematic Diagram (2 of 2)................................. 57
F Board Schematic Diagram................................................ 60
HM Board Schematic Diagram............................................. 62
H1 Board Schematic Diagram.............................................. 64
H2 Board Schematic Diagram.............................................. 66
H3 Board Schematic Diagram.............................................. 68
H4 Board Schematic Diagram.............................................. 70
TBoard Schematic Diagram................................................ 70
U Board Schematic Diagram................................................ 71
3-5. Semiconductors ................................................................... 73
SECTION 4: EXPLODED VIEWS........................................................ 74
4-1. Cover.................................................................................... 74
4-2. Bottom Cabinet .................................................................... 75
4-3. Chassis ................................................................................ 76
SECTION 5: ELECTRICAL PARTS LIST........................................... 77
SECTION TITLE PAGE SECTION TITLE PAGE
All manuals and user guides at all-guides.com

4
KDF-55XS955/60XS955
KDF-55XS955/60XS955
SPECIFICATIONS
Design and specifications are subject to change without notice.
120V AC, 60Hz
265W
Under 20W
HDMI IN
2 total
Video - 1080i, 720p, 480p, 480i
Audio - Two channel linear PCM 32, 44.1 and 48 kHz,
16, 20, and 24 bit
Video (IN)
4 total (1 on front panel)
1Vp-p, 75ohms unbalanced, sync negative
S Video (IN)
4 total (1 on front panel)
Y: 1Vp-p, 75ohms unbalanced, sync negative
C: 0.286Vp-p (Burst signal), 75ohms
Audio (IN)
7 total (1 on front panel)
500 mVrms (100% modulation)
Impedance:47 kilo ohms
Audio (VAR/FIX) Out
1 total
500 mVrms at the maximum volume setting (Variable)
500 mVrms (Fixed)
Impedance (Output):2 kilo ohm
Note: Audio Out jacks are operable only when
the TV’s speaker is set to Off.
Power Requirements
Power Consumption (W)
In Use (Max)
In Standby
Inputs/Outputs
Control S (IN)
1 total
Minijack
Control S (OUT)
1 total
Minijack
Component Video Input
2 (Y, PB, PR)
Y: 1.0 Vp-p, 75 ohms unbalanced, sync negative
PB
:
0.7 Vp-p, 75 ohms;
PR: 0.7 Vp-p, 75 ohms
RF Inputs
2 total
Digital Audio Optical Output (PCM/Dolby Digital)
1 total
Optical Rectangular (1)
CableCARD Slot
1 total
PCMCIAType I/II
CableCARD™isa trademark of Cable Television
Laboratories, Inc.
TruSurround, SRSand the ( )®symbolare trademarks
of SRS Labs, Inc.
TruSurround technology isincorporated underlicense
from SRS Labs, Inc.
BBEand BBESymbolare trademarks of BBESound,
Inc. and are licensed byBBE Sound, Inc.under U.S.
Patent No. 4,638,258 and 4,482,866.
Manufacturedunder license from
Dolby Laboratories Licensing
Corporation. Dolbyand thedouble-D
symbolare trademarks of Dolby
Laboratories Licensing Corporation.
This TVincorporatesHigh-Definition
Multimedia Interface (HDMI™)
technology.HDMI,the HDMI logo
and High-Definition Multimedia
Interface are trademarks or registered
trademarks ofHDMI Licensing LLC.
WEGA, Steady Sound, DigitalReality Creation,
CineMotion, Memory Stick, Memory StickDuo,
Memory Stick PRO, Memory Stick PRO Duo,
MagicGate,MID and TwinVieware trademarks ofSony
Corporation.
KDF-55XS955 KDF-60XS955
S
p
eaker Out
p
ut
(
W
)
Woofe
r
Dimensions (W x H x D)
mm 1,574 x 952 x 484 mm1,685 x 1,007 x 514 mm
in 62 x 37 1/2x 19 in 66 3/8 x39 5/8x 20 1/4in
Mass kg 48 kg51.5 kg
lbs 105 lbs 29 oz 113 lbs 19 oz
5W x 2
20W
All manuals and user guides at all-guides.com

5
KDF-55XS955/60XS955
KDF-55XS955/60XS955
Television system
American TV standard, NTSC
ATSC compliant 8VSB, ATSC (8VSB terrestrial)
ANSI/SCTE 07 2000 QAM on cable
Channel coverage
Terrestrial 2-69/ Cable TV: 1-125 (analog)
Terrestrial: 2-69/ Cable TV: 1-135 (digital)
Screen Size (measured diagonally)
55 inches (KDF-55XS955 Only)
60 inches (KDF-60XS955 Only)
Antenna
75-ohm external antenna terminal for VHF/UHF
Projection System
3 LCD Panels, 1 lens projection system
LCD Panel
0.87 inch TFT LCD panel Approx. 3.28 million dots
(1,042,168 pixels)
Projection Lens
High Performance, large diameter hybrid lens F2.4
Lamp UHP lamp, 132W XL-2100
Supplied Accessories
Remote Commander RM-Y915
Two Size AA (R6) Batteries
All manuals and user guides at all-guides.com

6
KDF-55XS955/60XS955
KDF-55XS955/60XS955
WARNINGS AND CAUTIONS
CAUTION
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any
servicing other than that contained in the operating instructions unless you are qualified to do so.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of
this receiver is directly connected to the ac power line.
!SAFETY-RELATED COMPONENT WARNING!!
Components identified by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe
operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements
published by Sony. Circuit adjustments that are critical for safe operation are identified in this manual. Follow these procedures
whenever critical components are replaced or improper operation is suspected.
ATTENTION!!
Ces instructions de service sont à l’usage du personnel de service qualifié seulement. Pour prévenir le risque de choc électrique, ne
pas faire l’entretien autre que celui contenu dans le Mode d’emploi à moins que vous soyez qualifié faire ainsi.
Afin d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifies par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces
sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants Sony dont le numero
de piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages de circuit dont l’importance
est critique pour la securite du fonctionnement sont identifies dans le present manuel. Suivre ces procedures lors de chaque
remplacement de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.
☛
☛
All manuals and user guides at all-guides.com

7
KDF-55XS955/60XS955
KDF-55XS955/60XS955
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or
touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and
mounting hardware have been replaced. Be absolutely certain that
you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors,
that were installed during a previous repair. Point them out to the
customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of
deterioration. Point them out to the customer and recommend their
replacement.
6. Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7. Check the B+ and HV to see if they are specified values. Make sure
your instruments are accurate; be suspicious of your HV meter if sets
always have low HV.
8. Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
Leakage Test
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. Acommercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instructions.
2. Abattery-operated AC milliampmeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low voltage scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
How to Find a Good Earth Ground
Acold-water pipe is a guaranteed earth ground; the cover-plate
retaining screw on most AC outlet boxes is also at earth ground. If the
retaining screw is to be used as your earth ground, verify that it is at
ground by measuring the resistance between it and a cold-water pipe
with an ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt
trouble- light (not a neon lamp) between the hot side of the receptacle
and the retaining screw. Try both slots, if necessary, to locate the hot
side on the line; the lamp should light at normal brilliance if the screw
is at ground potential (see Figure B).
To Exposed Metal
Parts on Set
0.15 F
Earth Ground
AC
Voltmeter
(0.75V)
Trouble Light
AC Outlet BoxOhmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage. Figure B. Checking for earth ground.
All manuals and user guides at all-guides.com
all-guides.com

8
KDF-55XS955/60XS955
KDF-55XS955/60XS955
SELF-DIAGNOSTIC FUNCTION
Self Diagnosis
Supported model
The units in this manual contain a self-diagnostic function. If an error occurs, the POWER/STANDBY or LAMP LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem. Adefinition of the POWER/STANDBY or LAMP LED flash
indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom is difficult to reproduced use the Remote
Commander to display the record that is stored at the internal NVM to specify the cause of the failure.
Diagnostic Test Indicators
When an error occurs, the POWER/STANDBY or LAMP LED will flash a set number of times to indicate the possible cause of the problem. If there
is more than one error, the LED will identify the first of the problem areas. If the errors occur simultaneously, the one that corresponds to the fewest
flashes is identified first.
Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
DiagnosticItem
Description
Number of times
STANDBY orLAMPLED
lam
p
flashes Probable Cause Detected Symptoms
Lamp cover error 3 times - Lamp cover isnot fastened securely- No picture/No sound
Fan error 4 times - Fan1-4 Power isnot supplied.(G2 board) - Fan connector isnot seated securely
- Fan caught wires or harnesses - No picture/No sound
Temperror4times- Internal temperature istoo high - IIC-E line connector isnot seated properly
(WE:H3 board, WF/XS:H4 board) - No picture/No sound
Lamp driver error 5 times -Lamp driver defect-No picture/No sound
Low B error 6 times -No "DD 6V " output (G1 board) - No picture/No sound
Audio error 7 times
- Short-circuitof Audio power supply line
(KD board, G1 board)
- Blowout of a fuse
(F4702,F4703,F4704 on KDboard)
-IC failure
(IC4703,IC4708,IC4710 on KDboard)
- No picture/No sound
D-OVP error8times- Overvoltage of +3.3V or +2.5V
(A board, B board) - No picture/No sound
ATSC-OVP error10 times-No "DTL MODULE 5V " output
(G1 board, G2 board) - No picture/No sound
Lamp error LAMP-LED isON. - Lamp isdead - No picture/No sound
All manuals and user guides at all-guides.com

9
KDF-55XS955/60XS955
KDF-55XS955/60XS955
Display of POWER/STANDBY or LAMP LED Flash Count
Projection lamp
under the panel Indicators
POWER/STANDBY
POWER
LAMP TIMER
STD/DUO
Screen
ForKDF-XS955 series
-Oneflashis notusedforself-diagnosis.
-Example
Diagnosis Number of times LED Flash
Lampcover3times
Fan 4 times
LED ON:0.3sec
LED OFF:0.3secLED OFF
3.0sec
Releasing the POWER/STANDBY LED Flash
Unplug the power cord from the outlet to temporarily stop the POWER/STANDBY lamp from flashing.
Self-Diagnosis Screen Display
For failures that are difficult to reproduce, or accompany occasional power off and/or picture mute, the Self-Diagnosis screen display is useful to
specify the cause..
To Bring Up Screen Test
In standby mode, press the buttons on the Remote Commander sequentially, in rapid succession, as shown below:
1. Display Channel 5 Sound Volume -Power ON
Self-Diagnostic Screen Display
SELFCHECK
1:LAMP ERR 0
3:
4:LAMP COVER0
FAN-E/TEMP-E 1
5:LAMP DRIVER
6:LowB-ERR 0
0
7:Audio-Prot
8:D-OVP 0
1
101 :WDT 0
10 :ATSC_OVP 0
"1" is displayed when a failure is detected one or more times
"0" is displayed when no failure has been detected
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you
have completed the repairs, clear the result display to “0”.
Note: The self-diagnostic function will not be able to detect any subsequent faults after completion of the repairs unless the result display is
cleared to “0”.
All manuals and user guides at all-guides.com

10
KDF-55XS955/60XS955
KDF-55XS955/60XS955
Clearing the Result Display
To clear the result display to “0”, press the buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below:
1. If the screen is already displayed, proceed to step 3. If not, Power off (Set to Standby model).
2. Press Display Channel 5 Sound Volume -Power ON
3. Press Channel 8ENTER
Clearing the Self-Diagnostic Screen
The self diagnosis screen display is cleared by turning off the set using the Remote Commander or the power switch.
Self-Diagnostic Circuit
Self-Diagnosis Function Operation
3 : Lamp cover The rib at the back of the lamp cover closes the SWon the T board to ground pin 3 ofCN8001.
It is monitored by the DE-micro (pin 94 of IC6902) and turns off the lamp when itisopened.
4 : Fan Fan rotation isdetected by "FAN-PROT" and the DE-micro (pin 92of IC6902) turns off the lamp
when it is "high".
4 : Temp When the temperature sensor on the H3 board (WEmodels) or H4 board (WF/XS models)
detects high temperature, or IIC-E line connector (CN6022:G2 board, CN44:H3board/H4board)
is not seated securely, the DE-micro turns off the lamp.
5 : Lamp driver When the "LAMP-PROT" (pin 95) islow, the lamp isnot turned on. If the "LAMP-HV-DET"
(pin 96) islow at the sametime, it is classified asno high voltage ofthe lamp driver.
6 : Low B error When no "DD6V " isdetected,pin 129 of TV-micro islow and it turns off the main power.
7 : Audio When DCvoltage is detected at the speaker or woofer outputs, pin 128 ofTV-micro islow and it
turns off the main power.
8 : D-OVP When overvoltage of "+3.3V" or"+2.5V" isdetected, pin 126 of TV-micro is low and it turns off
the main power.
10 : ATSC-OVP When no "Digital Module 5V" isdetected, pin 127 of TV-micro is low and itturns off the main
power.
LAMP : Lamp When the "LAMP-PROT" (pin 95) islow, the lamp isnot turned on. If the
"LAMP-HV-DET" (pin96) is high at the sametime, it isclassified asno lamp or a dead lamp.
All manuals and user guides at all-guides.com

11
KDF-55XS955/60XS955
KDF-55XS955/60XS955
Self-Diagnosis Block Diagram
IC41
94
IIC-E
LAMP-COVER
95
FAN PROT
4:Temp
IC6902
Display Engine u-com
H3(WE)/H4(WF/XS)
board
3:Lamp cover
5:Lamp
driver
4:Fan
SW
S8001
T board
Fan1
Fan2
Fan3
FAN1-PRT
FAN2-PRT
FAN3-PRT
CN6000
7:Audio
G2 board
Temp
sensor
2
8
5
92
Lamp
HV-DET
Lamp driver
Fan4
FAN4-PRT
11
96
LAMP-PROT
LAMP-HV-DET
8
13
CN6022
14
14
A8
A14
B14
16
CN6019
CN6017
B
IC3604 TVu-com
128
D_OVP
SP_DC_PROT
LB_ERROR
126
129
127 ATSC_OVP
KD board
CN6029
23
Aboard
CN6020
C26
8:D-OVP
+3.3V
+2.5V
Audio
amp
6:LowB
error
G1 boardCN6029
23
DD6V
DTL5
12:ATSC
OVP
CN6023
515
CN6006 Digital Box
DTL MDL5V
IIC-TV
IC3801 WEu-com
IIC-WE
IIC-TV
IIC-WE
All manuals and user guides at all-guides.com

12
KDF-55XS955/60XS955
KDF-55XS955/60XS955
Reading Lamp and Panel time
Use the following to determine the lamp and panel time of a set.
Screen Display Method
In standby mode, press the buttons on the Remote Commander sequentially, in rapid succession, as shown below:
1. Press Display Channel 5 Sound Volume +Power ON
2. To enter the DE-micro service menu, press Jump 3 times.
3. To display the Lamp time, press Channel 29 times.
example
PANEL NVMOK 9 OPTION_E
0 LAMP 0 Diff 1
LampTM14 LampCT71
The screen displays:
“Total lamp time is 14 hours” and “Total lamp ON/OFF cycle is 71 times”
To reset the lamp time press Channel 3Mute Enter .
WRI-EXE(Character color is Red) is momemtarily displayed and LampTM is reset to “0”.
4. To display the Panel time, press Channel 17 times
example
PANEL NVMOK 9 OPTION_E
7 SH SFT1 10 Diff 1
PanelTM14h
The screen displays:
“Total Panel time is 14 hours”
NOTE: You cannot reset the Panel time with the Service menu.
Exiting Service Mode
After completing the changes exit service mode by turning off the set using the Remote Commander or the power switch.
All manuals and user guides at all-guides.com
all-guides.com

13
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-1. REAR COVER REMOVAL
SECTION 1: DISASSEMBLY
1-2. CENTER PILLAR REMOVAL
Rear cover
Eleven screws
(+BVTP 4x16)
1
2
Center Pillar
3
1
2
4 Gently lift the Center Pillar up then out
from the bottom bracket.
Disconnect
three ground wires
Two screws
(+BVTP 4x16)
Three screws from the top of the center pillar
(+BVTP 4x16)
All manuals and user guides at all-guides.com

14
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-3. CHASSIS ASSEMBLYAND FAN REMOVAL
1-4. SERVICE POSITION
Pull back on claw, then gently pull out chassis assembly
Chassis assembly
1
Four screws
(+BVTP 3X12)
Disconnect one connector
and one ground wire
Four screws
(Washer Head +P 4x16)
One screw
(+PWH 4x16)
2
1Chassis assembly
6
3
5
4
All manuals and user guides at all-guides.com

15
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-5. POWER SUPPLYBLOCK REMOVAL (LAMP DRIVE UNIT)
1-6. RF ANTENNA SWITCH AND P BOARD REMOVAL
CAUTION: When removing the Power Supply Block be careful not to move the Optical Unit Block
Power supply block
2
4
1
5
3
Four screws (+BVTP 3x12)
Pull forward to remove
Unhook the antenna cable
Two screws (+PWH 4x16)
(to detach the cables from the
Optics Unit Block Assembly)
Disconnect two connectors
U bracket
1
3
RF antenna switch
2
Six Screws (+BVTP 3x12)
Disconnect one connector
and the ground wire 4
5
Pboard
Two screws
(+BVTP 3x8)
All manuals and user guides at all-guides.com

16
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-7. U BOARD, H4 BOARD, AND FAN REMOVAL
1-8. F BOARD AND G1 BOARD BOARD REMOVAL
6
7
G1 board
4
Claw
5
9
Gently pull back on the three clips
on the pin connection slots
while slowly lifting the G1 Board.
Disconnect two connectors
(CN1601 and CN1602)
and one ground wire (CN1607)
Remove one screw
(+BVTP 3X12 TYPE2)
Pull F Bracket out
and up to remove
Disconnect two connectors
(CN1908 and CN1909)
and two ground wires
(CN1902 and CN1903)
Disconnect two connectors (CN1603 & CN1604)
8Unfasten three Circuit Board Supports
Remove wires from purse locks
1
3
2
Disconnect the Power cord
from CN1900 connector.
U board
Gently pull back on tab to
release U board
Gently pull back on tabs
to release H4 board
1
3
Three screws
(Washer Head +P 4x16)
4
One screw
(+BVTP 3X12)
2
Four screws
(+BVTP 3X12)
5
All manuals and user guides at all-guides.com

17
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-9. ABOARD AND KD BOARD REMOVAL
1-10. Q BOX ASSEMBLYAND B BOARD REMOVAL
1
5Remove cables from purse locks
Q Box Assembly
4Gently pull back
on the two clips
on the Pin Connection slots
while slowly lifting the B board
2Remove two screws
(3X12), + BVWHTP
6Remove two screws
(+BVTP 3X12 TYPE2)
3Remove two connectors
(CN3501 and CN3502)
Remove cables from purse
B board
Disconnect six connectors 7
Unplug two coax cables
connected to the antenna switch
8
Remove four screws
(+BVTP 3X12) 9
1
2
Remove cables
from purse locks
3
Unfasten two Circuit Board Supports
Gently pull back
on the three clips
on the Pin Connection slots
while slowly lifting the Aboard
5Gently pull back
on the two clips
on the Pin Connection slots
while slowly lifting the KD board
Aboard
KD board
Disconnect three connectors
(CN8003, CN8004, and CN8008)
and coax cable from tuner
Disconnect three connectors
(CN4701, CN4705, and CN4702)
4
6
All manuals and user guides at all-guides.com
all-guides.com

18
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-12. WOOFER REMOVAL
1-11. G2 BOARD REMOVAL
G2 board
Disconnect 2 ground wires
(CN6013 and CN6015)
Disconnect 6 connectors
(CN6000, CN6024,
CN6028, CN6021,
CN6023, and CN6022)
3
1
2
3
Gently pull back on the two clips
while slowly lifting the G2 Board.
Four screws
(+TPTWH 4x25)
Disconnect
one connector
Woofer block assembl
y
3
2
1
All manuals and user guides at all-guides.com

19
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-13. OPTICS UNIT BLOCK ASSEMBLYAND D.C. FAN REMOVAL
1-14. T BOARD REMOVAL
1
Tboard
2
Disconnect
one connector
One screw (+BVTP 3x12)
Optics Unit block assy
D.C. Fan
2
4
3
1
Three screws
(+BVTP 3x12)
Pull forward to remove
Disconnect two connectors
Two screws
Special (+PW4X30)
All manuals and user guides at all-guides.com

20
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-15. FRONT COVER ASSEMBLYAND H1 BOARD REMOVAL
For detailed instructions on replacing the lamp, see
Page 16 of the Operating Instructions manual.
1-15-1.REPLACING THE LAMP
1-16. HM BOARD AND H2 BOARD REMOVAL
1
2
4
7
6
5
Two screws
(+BVTP 4x16)
Two screws (+BVTP 3X12 TYPE2 TT(B))
Disconnect one connector (CN4502)
3Two screws
+BVTP 3X12 TYPE2 TT(B)
H2 Board
HM Board
One screw
+BVTP 3X12 TYPE2 TT(B)
Disconnect USB cable
H2 Bracket
Pull out HM Bracket
and lift out HM Board
3
4
Two screws
(+BVTP 4X16 TYPE2 IT-3)
5
1
2One screw
(+BVTP 3X12 TYPE2 IT-3)
Disconnect one connector (CN171)
One Ornamental screw
Pull forward on the Front Cover Assembly
H1 Board
H1 Button
H1 Bracket
All manuals and user guides at all-guides.com

21
KDF-55XS955/60XS955
KDF-55XS955/60XS955
1-17. H3 BOARD AND SPEAKER REMOVAL
1-18. SCREEN MIRROR BLOCK ASSEMBLYREMOVAL
Caution:
When repairing anything inside the Screen Mirror Block Assembly be sure to clean the mirror and Diffusion Plate
to remove any dust particles.
Screen mirror block assembly
Note: Be sure to remove the screws that secure
the reinfocement plates (R)/(L).
1
3
2
Seven screws
(+BVTP 4x16)
Four screws
(+BVTP 4x16)
Disconnect three connectors
1
3
Two screws
(+BVTP 4x16)
Two screws
(+BVTP 3X12 TYPE2)
4
2
Disconnect one connector
(CN43)
H3 Board
Speaker Box (R)
1Seventeen screws
(+BVTP 4X16 TYPE2 TT(B))
2Four screws
(+BVTP 4X16 TYPE2 IT-3)
3Four screws
(+BVTP 4X16 TYPE2 IT-3)
Loudspeakers
Gently pull back on the two clips
while slowly lifting the H3 Board.
All manuals and user guides at all-guides.com